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Analog Devices Inc. ADM825TYKS-R7
- Part No.:
- ADM825TYKS-R7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
ADM825TYKS-R7.pdf
- Description:
- IC SUPERVISOR W/RESET SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:11,908
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Product details
Overview
ADM825TYKS-R7 from Analog Devices is a supervisory circuit with manual reset input and dual push-pull reset outputs, designed for microprocessor supply voltage monitoring in automotive-grade systems. It features a 3.08 V reset threshold (±0.05 V over −40°C to +125°C), 140 ms minimum reset timeout, guaranteed reset validity down to VCC = 1 V, and 5 µA typical supply current at 3 V. It operates in 5-lead SC70 package and supports reliable brownout detection in portable controllers.
For engineers reviewing the ADM825TYKS-R7 datasheet, ADM825TYKS-R7 pinout, ADM825TYKS-R7 application, or ADM825TYKS-R7 equivalent, key selection criteria include its manual reset capability, dual active-low/active-high RESET outputs, automotive temperature range (−40°C to +125°C), fixed 140 ms reset timeout, and compatibility with low-voltage 3 V systems requiring glitch-immune supervision.
Technical Context
The ADM825TYKS-R7 implements a precision voltage monitor with internal bandgap reference and hysteresis (5 mV), enabling stable reset assertion during VCC transients. Its manual reset input (MR) includes integrated 52 kΩ pull-up and 1 µs minimum pulse width requirement, with on-chip debounce and 100 ns glitch rejection.
Unlike ADM823/ADM824, the ADM825 lacks watchdog functionality but provides dual push-pull RESET/RESET outputs-both guaranteed functional down to VCC = 1 V-with logic-low and logic-high states actively driven. Reset remains asserted for ≥140 ms after VCC rises above 3.08 V or MR transitions high.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.08 V (typ), 3.00–3.15 V over −40°C to +125°C - sets precise brownout detection point for 3 V systems |
| Reset Timeout | 140–280 ms - ensures sufficient processor initialization time after power recovery |
| Supply Current | 5 µA (typ) at 3 V - enables use in battery-powered portable equipment with minimal quiescent load |
| Operating Temp | −40°C to +125°C - qualified for under-hood automotive and industrial embedded environments |
| VCC Validity | Reset output valid down to VCC = 1 V - maintains deterministic reset behavior during deep brownout |
| MR Input Pull-Up | 52 kΩ internal - eliminates need for external resistor; supports direct push-button connection to GND |
| Reset Output Type | Dual push-pull (RESET low-active, RESET high-active) - drives both logic states without external components |
Pinout & Package
ADM825TYKS-R7 is housed in a 5-lead SC70 (KS-5) package, measuring 2.00 mm × 1.25 mm × 0.90 mm, with gull-wing leads and JEDEC MO-203-AA compliance. The package supports reflow soldering and offers thermal impedance of 146°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET | Active-low push-pull reset output; asserted when VCC < 3.08 V, MR low, or during reset timeout |
| 2 | GND | Ground reference for all internal comparators, timers, and output drivers |
| 3 | RESET | Active-high push-pull reset output; complementary to Pin 1, valid down to VCC = 1 V |
| 4 | VCC | Monitored power supply input (2.7 V to 3.6 V); powers internal circuitry and defines MR/RESET thresholds |
| 5 | MR | Manual reset input; active-low, internally pulled up to VCC via 52 kΩ; ≥1 µs pulse required to trigger reset |
Key Features
| Feature | Design Value |
|---|---|
| Dual push-pull RESET outputs | Eliminates need for external pull-up/pull-down resistors in either active-low or active-high reset architectures |
| Automotive temperature range | Valid operation from −40°C to +125°C enables deployment in engine control units and ADAS modules |
| Guaranteed reset below 1 V VCC | Ensures deterministic reset state even during severe brownout or battery sag conditions |
| Integrated MR pull-up | Reduces BOM count by removing external bias resistor; simplifies push-button interface design |
| Power supply glitch immunity | Rejects transients ≤100 ns, preventing spurious resets in electrically noisy automotive environments |
Applications
| Engine Control Unit (ECU) | Industrial PLC Controller |
|---|---|
|
Use Scenario: Monitors 3.3 V supply rail in diesel ECU during cold cranking, where battery voltage dips below 6 V and MCU must remain held in reset until stable. IC Role / Device Role / Timing Role: Supervisory circuit asserting dual RESET signals to hold MCU and peripheral ASICs in known state until VCC exceeds 3.08 V and stabilizes for ≥140 ms. Use Value: Prevents erratic code execution during marginal power conditions; dual outputs simplify interface to legacy reset logic requiring active-high and active-low asserts. |
Use Scenario: Embedded controller in modular I/O rack operating in factory floor environment with 3 V backup battery and frequent power cycling. IC Role / Device Role / Timing Role: Provides manual reset via front-panel button (MR pin) and automatic reset on main 3.3 V rail undervoltage, with guaranteed output validity down to 1 V. Use Value: Enables field-serviceable reset without opening enclosure; low 5 µA current extends battery life during standby. |
| Telematics Control Unit (TCU) | Portable Medical Monitor |
|
Use Scenario: LTE-based TCU powered from vehicle battery with wide input variation (9–16 V), regulated to 3.3 V; requires fail-safe reset during ignition transients. IC Role / Device Role / Timing Role: Voltage supervisor detecting brownout on 3.3 V domain and asserting synchronized RESET/RESET to application processor and modem baseband IC. Use Value: Glitch immunity prevents false resets during load-dump events; automotive temp rating ensures reliability across cabin temperature extremes. |
Use Scenario: Battery-powered patient monitor with 3 V lithium coin cell and ultra-low-power MCU that must wake only on valid supply. IC Role / Device Role / Timing Role: Primary reset generator holding system in reset until 3 V rail reaches 3.08 V and remains stable for 140 ms post-power-on. Use Value: 5 µA quiescent current minimizes battery drain during sleep; SC70 footprint saves PCB area in space-constrained handheld enclosure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory circuit applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADM825TYRJ-R7 | SOT-23-5 package (RJ-5), same 3.08 V threshold and −40°C to +125°C rating | Larger footprint (3.0 × 1.7 mm vs. 2.0 × 1.25 mm) and higher thermal impedance (270°C/W) | Select when SOT-23 layout reuse or hand-soldering preference outweighs size/power advantages of SC70 |
| TPS3808G30DBVR | Texas Instruments part; 3.0 V threshold, 200 ms reset timeout, 1.6 µA supply current, SOT-23-5 | No dual RESET outputs - single active-low push-pull only; no MR input | Choose when lowest quiescent current is critical and manual reset or complementary output not required |
Compared with ADM825TYKS-R7, ADM825TYRJ-R7 offers identical electrical specs in a larger, thermally less efficient package, while TPS3808G30DBVR reduces current draw but sacrifices manual reset and dual-output flexibility-making ADM825TYKS-R7 optimal for space-constrained automotive systems needing robust, user-initiated reset capability.
Availability
ADM825TYKS-R7 is available at Aetrix Electronics and suitable for automotive ECUs, industrial PLCs, telematics units, and portable medical monitors requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ADM825TYKS-R7 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices, Inc. is a global semiconductor company specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision measurement and control.
The ADM825 belongs to Analog Devices' supervisory circuits product line, engineered specifically for robust power-on reset, brownout protection, and manual reset handling in automotive and industrial microprocessor systems.
FAQ
What is the exact reset threshold voltage of the ADM825TYKS-R7 and how does it vary with temperature?
The ADM825TYKS-R7 has a nominal reset threshold of 3.08 V at 25°C, with a guaranteed range of 3.00 V to 3.15 V across the full −40°C to +125°C operating temperature range. Its temperature coefficient is 40 ppm/°C, resulting in ≤±12 mV drift over the entire range. This tight tolerance ensures consistent brownout detection in 3 V systems without calibration.
Does the ADM825TYKS-R7 include a watchdog timer function?
No, the ADM825TYKS-R7 does not include a watchdog timer. Per the Analog Devices ADM823/ADM824/ADM825 selection table, only ADM823 and ADM824 feature watchdog input (WDI). The ADM825TYKS-R7 is configured exclusively with manual reset (MR) and dual push-pull reset outputs (RESET and RESET), making it suitable for applications requiring user-initiated reset without code-execution monitoring.
What is the function of Pin 3 on the ADM825TYKS-R7, and how does it differ from Pin 1?
Pin 3 of the ADM825TYKS-R7 is the active-high RESET output, while Pin 1 is the active-low RESET output. Both are push-pull and guaranteed functional down to VCC = 1 V. This dual-output architecture allows direct interfacing with systems requiring either polarity without external inverters or pull resistors-e.g., Pin 1 drives legacy microcontrollers expecting active-low reset, while Pin 3 drives FPGAs or ASICs requiring active-high assertion.
Can the ADM825TYKS-R7 operate reliably with a 2.8 V supply voltage?
Yes, the ADM825TYKS-R7 is specified for VCC = 2.7 V to 3.6 V, so 2.8 V is within its operational range. At 2.8 V, the reset threshold remains 3.08 V (typ), meaning the device will assert reset continuously until VCC rises above that level. Its guaranteed reset validity down to VCC = 1 V ensures correct output behavior even during rapid 2.8 V → 1 V droop, supporting graceful shutdown sequencing.
What package type and dimensions does the ADM825TYKS-R7 use, and is it RoHS compliant?
The ADM825TYKS-R7 uses the 5-lead SC70 (KS-5) package, measuring 2.00 mm × 1.25 mm × 0.90 mm with gull-wing leads. It complies with JEDEC MO-203-AA standards and is RoHS compliant (denoted by "Z" suffix per Analog Devices ordering guide). The "R7" suffix indicates tape-and-reel packaging with 3,000 units per reel.
ADM825TYKS-R7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 3.08V
- Output:
- Push-Pull, Push-Pull
- Reset:
- Active High/Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-5
ADM825TYKS-R7 FAQ
1.How can I place an order for ADM825TYKS-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM825TYKS-R7 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for ADM825TYKS-R7 reliable?
The price and inventory of ADM825TYKS-R7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM825TYKS-R7 is usually 5 days.
3.What payment methods are accepted for ADM825TYKS-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM825TYKS-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM825TYKS-R7?
ADM825TYKS-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM825TYKS-R7 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for ADM825TYKS-R7?
For technical support, including ADM825TYKS-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM825TYKS-R7 requirements.
6.How does Aetrix verify that ADM825TYKS-R7 is sourced from the original manufacturer or authorized distributors?
All ADM825TYKS-R7 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ADM825TYKS-R7 meets industry standards.
7.What is the process for return or replacement of ADM825TYKS-R7?
All ADM825TYKS-R7 units undergo pre-shipment inspection (PSI). If there is an issue with ADM825TYKS-R7, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The ADM825TYKS-R7 part is unused and in its original packaging.
Return procedure for ADM825TYKS-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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